JimC- I would be pleased to do the rather simple math for you. First, I would need you to tell me how many shooters at the club where the lead was mined shoot new shot and reclaimed shot. Then how often the lead has been recovered from the club and the percentage of total lead at the club was reclaimed. Then, making the probably erroneous assumption that these ratios have been constant over several years, I could give you a number. Both the accuracy and relevancy of my number could be questioned. But, I can derive a mathematical number based on inaccurate information and the accuracy of my number cannot be better than the numbers I use for the calculations.